Exploited CVEs / CVE-2024-27199
CVE-2024-27199
JetBrains TeamCity Relative Path Traversal Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted, and the vulnerability is known to be used in ransomware campaigns. Federal agencies were required to remediate by 2026-05-04 (that deadline has passed); treat that date as the outer bound for your own environment. Check the vendor security advisory for the fix.
Actively exploited JetBrains TeamCity vulnerability, High severity, CVSS 7.3. Added to the CISA KEV catalog 2026-04-20.
Risk summary
Updated July 27, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.
Senserva AI Opinion for CVE-2024-27199
This is an authentication bypass style path traversal in JetBrains TeamCity that lets an unauthenticated attacker reach certain admin endpoints without valid credentials, which is why an EPSS score at 100 percent and confirmed ransomware use line up here. Any organization running a self-hosted TeamCity CI/CD server is exposed, and because build servers hold source code, deploy keys, and pipeline secrets, a compromise can cascade into your production environment. CISA added it to the KEV list on 2026-04-20, confirming active exploitation.
Do this: Upgrade TeamCity to the fixed release now, and if you cannot patch immediately take the server off the public internet and review recent admin actions and created accounts for signs of abuse.
AI-generated from public data, 2026-07-22. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2024-27199
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for CVE-2024-27199
Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.
CISA required action
Federal (BOD 22-01) remediation due date: 2026-05-04 (past due).
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Official fix for CVE-2024-27199
Check the vendor's security advisory channel for the patched TeamCity versions and workarounds.
Common questions about CVE-2024-27199
Is CVE-2024-27199 actively exploited?
Yes. CVE-2024-27199 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2026-04-20, which means exploitation in the wild has been confirmed, not predicted. Its EPSS 30-day exploitation probability is 100%. CISA also reports it is known to be used in ransomware campaigns.
What is the CISA deadline and required action for CVE-2024-27199?
CISA set the federal (BOD 22-01) remediation due date at 2026-05-04, which has passed; treat any unremediated system as overdue. The verbatim required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
What fixes CVE-2024-27199?
Check the vendor's security advisory for the patched TeamCity versions and any workarounds. KEV listing makes this a fix-first item: patch it ahead of higher-CVSS issues nobody is exploiting.
Can I ask my own AI about CVE-2024-27199?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2024-27199's key facts: severity, CVSS, EPSS, the KEV date, the CISA due date, and the required action. Copy it into Claude, ChatGPT, or Copilot; the data is refreshed twice a day (5 AM and 3 PM US Central).
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Authoritative references
Every actively exploited CVE, searchable with due dates and CSV export: the exploited-CVE tracker. The newest additions: exploited this week.
